flog

flog is a command‑line utility that creates synthetic log entries in several widely used formats, including Apache common, Apache combined, Apache error, RFC 3164, RFC 5424, a generic common log format, and JSON. It can write the generated data to standard output, plain files, or gzip‑compressed files, and supports both fixed‑size and time‑based generation parameters. Users can control the number of lines, total byte size, per‑entry timestamps, and introduce artificial delays or looping for continuous output.

The tool is intended for developers and testers who need realistic log streams for pipelines such as Amazon Kinesis, log‑processing services, or any system that consumes log data. By providing configurable formats and output options, it enables reproducible test data without requiring real traffic.

Installation is available through Go, Homebrew, pre‑built archives, or Docker images, and the project is released under the MIT license. It is marked as stable and includes a CLI flag set for fine‑grained control over generation behavior.